https://github.com/alincode/20190520-show-me-the-code
https://github.com/alincode/20190520-show-me-the-code
Last synced: over 1 year ago
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- Host: GitHub
- URL: https://github.com/alincode/20190520-show-me-the-code
- Owner: alincode
- Created: 2019-05-08T13:09:43.000Z (about 7 years ago)
- Default Branch: master
- Last Pushed: 2019-05-20T09:40:46.000Z (about 7 years ago)
- Last Synced: 2025-02-16T13:44:10.382Z (over 1 year ago)
- Language: JavaScript
- Size: 4.88 KB
- Stars: 0
- Watchers: 2
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
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README
# 20190520-show-me-the-code
分享的可以是一個簡單概念、一個小技巧，大啟發。
### what is functional programming?
In computer science, functional programming is a programming paradigm
a style of building the structure and elements of computer programs—that
treats computation as the evaluation of mathematical functions and
avoids changing-state and mutable data.
* paradigm: 是一組獨特的概念或思維模式，包括理論，研究方法
1. avoids changing-state
2. avoid side effect
### Good For
* more readable
* 不 share state，很難寫出一個長 function
* ease of testing:
* 避免使用外部資源，只使用 input 值，很難有 side effect
* 每個 function 都會有回傳值，可以被測試驗證。
### how to more functional
* less side effect
* use no side effect function
* less temporary variables, e.g. get data by query
* always return data
* immutable
* avoids to modify function parameter
* or use lodash.cloneDeep
* for, while ---> map
### some advice
* skip framework first, just focus on language
### FP libraries for JS
* Immutable.js:
* Functional Programming With Lodash/FP:
* Ramda: